Bradley Cooper kisses Irina Shayk in rare PDA moment at Paris Fashion Week party

Bradley Cooper couldn't resist his lady in red!

The 41-year-old actor -- who's dated Renee Zellweger and Suki Waterhouse in the past -- has been careful in prior relationships not to show any signs of PDA -- but that's not the case with supermodel Irina Shayk.

WATCH: How Bradley Cooper Went From 'Not Really F***able' to Sexiest Man Alive

The happy couple showed up to the L'Oreal Red Obsession Party as part of Paris Fashion Week on Tuesday, and were caught in a passionate kiss. Then again, the 30-year-old model did look irresistible in her red, cleavage-baring gown.

Getty Images

Going even more public with their relationship, Cooper and Shayk also posed for photos at the party, and were snapped standing alongside Nicole Scherzinger's ex-fiance, Lewis Hamilton.

Getty Images

Over the past few days, Cooper has been supporting his girlfriend at Paris Fashion Week. On Sunday, he was seen front row at the Givenchy fashion show, watching intently as Shayk walked the runway.

WATCH: Jennifer Lawrence Talks Frenching Bradley Cooper

Just prior to Shayk jetting off to the City of Light, she spoke with ET about her career goals, and clearly Cooper has her back. She touted, "I'm still here, and I'm not going anywhere."